usr/src/uts/sun4u/sys/iommu.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1991-2000 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26 /*
  27  * Copyright 2012 Garrett D'Amore <garrett@damore.org>.  All rights reserved.
  28  */
  29
  30 #ifndef _SYS_IOMMU_H
  31 #define _SYS_IOMMU_H
  32
  33 #if defined(_KERNEL) && !defined(_ASM)
  34 #include <sys/sunddi.h>
  35 #include <sys/sysiosbus.h>
  36 #include <sys/ddi_impldefs.h>
  37 #endif /* defined(_KERNEL) && !defined(_ASM) */
  38
  39 #ifdef  __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 #ifndef _ASM
  44 /* constants for DVMA */
  45 /*
  46  * It takes an 8byte TSB entry to map i an 8k page, so the conversion
  47  * from tsb size to dvma mapping is to multiply by 1000 or 0x400
  48  * left shift by 10 does this
  49  */
  50 #define IOMMU_TSB_TO_RNG        0xa
  51 #define IOMMU_TSB_SIZE_8M       0x2000
  52 #define IOMMU_TSB_SIZE_16M      0x4000
  53 #define IOMMU_TSB_SIZE_32M      0x8000
  54 #define IOMMU_TSB_SIZE_64M      0x10000
  55 #define IOMMU_TSB_SIZE_128M     0x20000
  56 #define IOMMU_TSB_SIZE_256M     0x40000
  57 #define IOMMU_TSB_SIZE_512M     0x80000
  58 #define IOMMU_TSB_SIZE_1G       0x100000
  59
  60 #define IOMMU_PAGESIZE          0x2000          /* 8k page */
  61 #define IOMMU_PAGEMASK          0x1fff
  62 #define IOMMU_PAGEOFFSET        (IOMMU_PAGESIZE - 1)
  63 #define IOMMU_N_TTES            (IOMMU_DVMA_RANGE/IOMMU_PAGESIZE)
  64 #define IOMMU_TSB_TBL_SIZE      (IOMMU_N_TTES << 3)     /* 8B for each entry */
  65 #define IOMMU_PAGESHIFT         13
  66
  67 #define OFF_IOMMU_CTRL_REG      0x2400
  68 #define IOMMU_CTRL_REG_SIZE     (NATURAL_REG_SIZE)
  69 #define OFF_TSB_BASE_ADDR       0x2408
  70 #define TSB_BASE_ADDR_SIZE      (NATURAL_REG_SIZE)
  71 #define OFF_IOMMU_FLUSH_REG     0x2410
  72 #define IOMMU_FLUSH_REG         (NATURAL_REG_SIZE)
  73 #define OFF_IOMMU_TLB_TAG       0x4580
  74 #define OFF_IOMMU_TLB_DATA      0x4600
  75
  76 #define TSB_SIZE                3               /* 64M of DVMA */
  77 #define TSB_SIZE_SHIFT          16
  78 #define IOMMU_TLB_ENTRIES       16
  79
  80 #define IOMMU_DISABLE           0               /* Turns off the IOMMU */
  81 #define IOMMU_ENABLE            1               /* Turns on the IOMMU */
  82 #define IOMMU_TLB_VALID         0x40000000ull
  83 #define IOMMU_DIAG_ENABLE       0x2ull
  84
  85 /*
  86  * Bit positions in the TLB entries
  87  */
  88 #define IOMMU_TLBTAG_WRITABLE   (1 << 21)
  89 #define IOMMU_TLBTAB_STREAM     (1 << 20)
  90 #define IOMMU_TLBTAG_SIZE       (1 << 19)
  91 #define IOMMU_TLBTAG_VA_MASK    0x7ffff /* 19-bit vpn */
  92 #define IOMMU_TLBTAG_VA_SHIFT   13
  93
  94 #define IOMMU_TLBDATA_VALID     (1 << 30)
  95 #define IOMMU_TLBDATA_LOCAL     (1 << 29)
  96 #define IOMMU_TLBDATA_CACHEABLE (1 << 28)
  97 #define IOMMU_TLBDATA_PA_MASK   0xfffffff /* 28-bit ppn */
  98 #define IOMMU_TLBDATA_PA_SHIFT  13
  99
 100 /*
 101  * define IOPTEs
 102  */
 103 #define IOTTE_PFN_MSK   0x1ffffffe000ull
 104 #define IOTTE_CACHE     0x10ull
 105 #define IOTTE_WRITE     0x2ull
 106 #define IOTTE_STREAM    0x1000000000000000ull
 107 #define IOTTE_INTRA     0x800000000000000ull
 108 #define IOTTE_64K_PAGE  0x2000000000000000ull
 109 #endif  /* _ASM */
 110 #define IOTTE_VALID     0x8000000000000000ull
 111 #define IOTTE_PFN_SHIFT 13
 112
 113 /*
 114  * IOMMU pages to bytes, and back (with and without rounding)
 115  */
 116 #define iommu_ptob(x)   ((x) << IOMMU_PAGESHIFT)
 117 #define iommu_btop(x)   (((ioaddr_t)(x)) >> IOMMU_PAGESHIFT)
 118 #define iommu_btopr(x)  \
 119         ((((ioaddr_t)(x) + IOMMU_PAGEOFFSET) >> IOMMU_PAGESHIFT))
 120
 121 #if defined(_KERNEL) && !defined(_ASM)
 122
 123 /* sbus nexus private dma mapping structure. */
 124 struct dma_impl_priv {
 125         ddi_dma_impl_t mp;
 126         struct sbus_soft_state *softsp;
 127         volatile int sync_flag;
 128         uint64_t phys_sync_flag;
 129 };
 130
 131 extern int iommu_init(struct sbus_soft_state *, caddr_t);
 132 extern int iommu_resume_init(struct sbus_soft_state *);
 133 extern int iommu_dma_mctl(dev_info_t *, dev_info_t *, ddi_dma_handle_t,
 134         enum ddi_dma_ctlops, off_t *, size_t *, caddr_t *, uint_t);
 135 extern int iommu_dma_allochdl(dev_info_t *, dev_info_t *, ddi_dma_attr_t *,
 136         int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *);
 137 extern int iommu_dma_freehdl(dev_info_t *, dev_info_t *, ddi_dma_handle_t);
 138 extern int iommu_dma_bindhdl(dev_info_t *, dev_info_t *, ddi_dma_handle_t,
 139         struct ddi_dma_req *, ddi_dma_cookie_t *, uint_t *);
 140 extern int iommu_dma_unbindhdl(dev_info_t *, dev_info_t *, ddi_dma_handle_t);
 141 extern int iommu_dma_flush(dev_info_t *, dev_info_t *, ddi_dma_handle_t,
 142         off_t, size_t, uint_t);
 143 extern int iommu_dma_win(dev_info_t *, dev_info_t *, ddi_dma_handle_t,
 144         uint_t, off_t *, size_t *, ddi_dma_cookie_t *, uint_t *);
 145
 146 extern void iommu_dvma_kaddr_load(ddi_dma_handle_t h, caddr_t a, uint_t len,
 147     uint_t index, ddi_dma_cookie_t *cp);
 148
 149 extern void iommu_dvma_unload(ddi_dma_handle_t h, uint_t objindex, uint_t view);
 150
 151 extern void iommu_dvma_sync(ddi_dma_handle_t h, uint_t objindex, uint_t view);
 152
 153 #endif /* _KERNEL && !_ASM */
 154
 155 #ifdef  __cplusplus
 156 }
 157 #endif
 158
 159 #endif  /* _SYS_IOMMU_H */